Ski



March 5, 1935. B. uLLEvoLDsAE'rER 1,993,636

I SKI F'ledjlarch 1. 1954.

Patentes Mss s, 193s f l 1,993,636

UNITED STATES PATENT ori-*ICE SKI Bjorn Ullevoldsaeter, Seben, Norway,assignor to Peter Schou Ostbye, Lilievand, Voksankollen, near Oslo,Norway v Application March 1, 1934, Serial No. '113,575

En Norway January 18, 1933 3 Claims. (Cl. 208-184) It has formerly beenproposed to produce a ski 3, is given a thickness which decreasestowards of two or more layers of different material, which both of itsends in suchl a manner that the layers are glued together in order tomake the ski as 1 and 3 may be interconnected a distance at each lightas possible, retaining a hard running surend of the ski. i g face.However, it is found that skis produced in By tapering the central'layer2 the ski-receives 5 this manner quickly lose their'bending or springaform which now is common to all skis, when iness at the same time asthey, owing to the inthe layers are glued together by means of anagterior work in the material in the respective glutinant which is notsoluble in water and when layers, easily become warped. simultaneouslypressed against a forming block.. lo 'I'he present invention, whichrelates to an im- The layers are so interconnected that the ski 1oprovement in skis produced of three superposed` retains the formedbending or springiness B, since layers, aims to remove the above nameddrawthe upper layer 3, owing to 'its length being backs and is mainlydistinguished thereby that greater than that of the underlying layers,will the thickness of the intermediate or central layer hold or lock thelast 'named layers in the bent jg decreases from the middle of the skitowards position. 15'- both 'of the ends thereof. As will be understoodthe ski according to the By this arrangement it is shown that the skipresent invention may be manufactured in difdoes not become warped, andat the same time it ferent manners. Thus the upper and lower layersalways retains its springiness vowing to the fact 1 and 3 may be madefrom a single-piece of mate- 20 that the upper layer serves as a lockingmember rial 4 which is split from one end in such a length 20 for theunderlying layers in their original bent that a short vportion is 'jleftat the other end, position and acts as a spring so'as to always bringwhereupon the central layer .2 is inserted and se said layers back intothe original position. cured to the two halves during forming or bend-The invention is illustrated by way of example ing as above described.The central layer 2 may g5 in the accompanying drawing in which: becomposed of two or more layers 2', 2" (Fig. 25

Figure 1 shows a ski seen from the side thereof, 4) which are connectedto each other with the de- Figure 2 shows the three layers. from whichsirerl longitudinal bending, and this ensures still the ski is produced,before the interconnection further the retention of the bending orspringand bending of the same, iness of the ski.

Figure 3 shows a single piece of material con- I claim: 30 stituting theupper and lower layers of the ski, 1. Ski produced of three super-posedwooden and layers which are glued together, characterized in Figure 4shows the central layer composed of a this that the thickness 0f theeentrl Wer denumber of pieces or layers. creases from the middle of theski towards both 5 As shown in the drawing'the ski consists of endsthereof. t 85 three superposed layers 1, 2 and 3 of which the 2. Skieeeerdine 15 Gleim 1. in which the eenlower layer or shoeing 1 isproduced from a hard el leyer I8 .Shorter then the Upper and lower wood,the central layer 2 from a light wood andthe lBYerS S0 the# these eredirectly connected t0 each upper layer 3 preferably from a hard woodcorre- Other et 011e 0r beth ends 0f the ski.

u spondmsiothewood intneioweriayer 1. Accord- 3- Ski wwrdins w claim 1,in which the cen- 40 ing to the invention the middle or central layer 2,"el leyel' i8 eemped 0f a number 0f which in theembodiments illustratedis produced leyel. somewhatshortertbanthetwootherlayersiandBJRNUIl-l-'VQI-Dm

